Phlegm in the mouth is often caused by allergies and sinus infections, and is usually expelled from the chest and throat. It can be a sign of infection and may require medical attention if it persists. Phlegm is thicker than mucus and coughing it up helps clear the body of infection.
The causes of phlegm in the mouth are often related to allergies and sinus infections. Most of the time, phlegm makes its way into the mouth from the chest and throat because phlegm in the mouth is almost always expelled from these areas. In most cases, the excess phlegm disappears when the root cause has disappeared. As allergies subside or cold and sinus problems resolve on their own, the amount of phlegm a person passes out will almost always decrease. People who smoke occasionally cough up a lot of phlegm in the morning and many people who quit smoking have reported that the excess phlegm disappeared once they quit smoking.
People who have allergies or cold and sinus problems may end up dealing with phlegm in their mouth. In most cases, phlegm develops inside the chest and lungs when a person has had problems with allergies or sinus infections for a long time. Phlegm is often associated with an infection and can be green to brown in color. People who pass phlegm for more than a week may need to see their doctors to rule out the possibility of infection. If a person has been coughing up a lot of phlegm over a long period of time, they may have developed pneumonia or bronchitis, which can occasionally turn into a common cold and allergies.
Contrary to popular belief, phlegm and mucus are not exactly the same thing. Many people who experience phlegm in their mouth may believe it’s just mucus when phlegm is actually the problem. It is often possible to distinguish between phlegm and mucus by noting the consistency. Phlegm is usually much thicker than mucus and does not originate inside the nose or sinuses as mucus does. Mucus almost always flows out of the nose from the sinus area when a person has a cold or allergies, and phlegm is normally expelled from the chest or inside the throat.
Coughing up a lot of phlegm can be annoying for many people, but it’s actually helpful. Getting rid of phlegm in the mouth is one way the body clears itself of infection, and coughing up this excess means that the fluid that has settled in the chest and lung area is moving out of the body. When fluid enters the lungs and chest and a person does not expel it, there is a very good chance they will develop pneumonia, which can sometimes be life-threatening.
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